coherence as a consideration in near-field listening has to do with at what listening distance AND HEIGHT that the drivers meld together in a natural soundstage, proper balance, and phase coherence (some NEVER do). for instance in a tall line array like a Wisdom or Pipedreams you need to be further back for the drivers to "work" correctly. a single-driver Louther on the other hand, would be coherent at a much closer distance. some speakers never work properly in the near-field. you can experiment by starting at a few feet and slowly move back untill things sound "right". remember to also try different heights of your listening chair as you move back.
this issue is mostly related to the dispersion pattern of your tweeter as the high-frequencies are very directional. this is also why height is so important in the near-field on some speakers.
the biggest problem of near-field listening in a large space is the challenge of being able to fill the room with bass energy without blowing yourself out of your chair. for proper bass weight and warmth some room loading is necessary. if not properly addressed the sound can be thin and the "presense" and "weight" can be lacking.
this issue is mostly related to the dispersion pattern of your tweeter as the high-frequencies are very directional. this is also why height is so important in the near-field on some speakers.
the biggest problem of near-field listening in a large space is the challenge of being able to fill the room with bass energy without blowing yourself out of your chair. for proper bass weight and warmth some room loading is necessary. if not properly addressed the sound can be thin and the "presense" and "weight" can be lacking.